Re: Car More Dead from Boosting a Dead Car Battery



D from BC wrote:

Taken from
http://www.canadiandriver.com/winter/050126.htm
{
Some car manufacturers do not recommend boosting a vehicle, They state that damage to electronic controls can occur if voltage surges flow through the electrical system during boosting. Instead of boosting, the auto manufacturers prefer that a fully charged battery be installed in place of the dead one or that the dead battery be charged. This is often impractical because of where the vehicle is sitting so most people with a dead battery boost their vehicle - but several important steps must be followed to prevent damage. }
Come 'on... is it impossible to throw in some protection electronics?
And what about this surge?...Wimpy car electronics? Perhaps HV spikes from the booster wire inductance can zap the computer and other loads..
Would you buy a car that has a big sticker: "Contains sensitive electronics..do not boost"

One should always check to make sure there is no open cell/circuit
in the current battery that is mounted in the car otherwise, a boost
start will most likely cause damage as soon as you remove the external
source from it's own source..
Most of the time you should first clean your connector clamps before
jumping since, this maybe the original reason why your battery is low/dead in the first place. If you do have a bad connection at the cables and you boost start, your electrical system may become unstable
because the alternator is not seeing a constant voltage at it's output
terminal which causes it's own regulator to become unstable since it
treats the battery as if it was a capacitor also.
Many car's employ protection in this area, for example, if you get a
boost start and if the battery is completely shot or cable/clamps have
no connection, as soon as you disconnect the boost cables, the car will
stall.




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